OPR-J359-KR-20 Offshore Apalachicola, FL Northwest Gulf of Mexico Fugro USA Marine, Inc. H13358 4 5 Miles southeast of Government Cut Florida United States 20000 2020 Dean R Moyles Navigable Area 2020-03-25 2020-06-20 2020-09-26 Multibeam Echo Sounder (MBES) Multibeam Acoustic Backscatter (MBAB) meters UTC NAD83 Zone 16N Atlantic Hydrographic Branch Any revisions to the Descriptive Report (DR) applied during office processing are shown in red italic text. The DR is maintained as a field unit product, therefore all information and recommendations within this report are considered preliminary unless otherwise noted. The final disposition of survey data is represented in the NOAA nautical chart products. All pertinent records for this survey are archived at the National Centers for Environmental Information (NCEI) and can be retrieved via https://www.ncei.noaa.gov/. Products created during office processing were generated in NAD83 UTM 16N, MLLW. All references to other horizontal or vertical datums in this report are applicable to the processed hydrographic data provided by the field unit. CC0-1.0 (NOAA Contractors) CC0-1.0 https://creativecommons.org/publicdomain/zero/1.0/ https://creativecommons.org/publicdomain/zero/1.0/legalcode These data were produced under contract with NOAA and any potential copyright was assigned to NOAA. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0). Contractor Survey H13358 (Table 1) is the southeastern approach to Government Cut (Figure 1). The M/V GO Freedom acquired complete coverage multibeam echosounder (MBES) and multibeam echosounder acoustic backscatter (MBAB) within the assigned survey limits from 20 June 2020 to 9 July 2020. The M/V Pelagos acquired complete coverage MBES and MBAB within the assigned survey limits 25 and 26 September 2020. 29.547941722222223 84.93603908333334 29.52025363888889 84.7618 Survey H13358 relative to overall sheet limits of OPR-J359-KR-20 file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_Overview.jpg Survey limits were acquired in accordance with the requirements in the Project Instructions and the HSSD. The Offshore Apalachicola project will provide contemporary surveys to update National Ocean Service (NOS) nautical charting products and services. It is offshore of Apalachicola Bay and Joseph Bay, FL. The survey will provide updated bathymetry and feature data to address concerns of migrating shoals, thus reducing the risk to navigation within the project area. The Apalachicola Surveys delineate the western extent of the Big Bend Mapping project, a Florida Coastal Mapping Program (FCMaP) priority. This multi-year, multi-agency mapping project will fill in an area in which only 2% of the seafloor is mapped to modern standards. Improving the understanding of the bathymetry, geomorphology, bio-diversity and distribution of habitats in this region will support Floridian fisheries, coastal modeling, and resource management. The project will cover approximately 430 square nautical miles of high priority survey area identified in the latest iteration of NOAA HSD's risk-based prioritization model. Data from this project will supersede all prior survey data by providing modern hydrographic survey data for this area and updating the local charting products. The entire survey is adequate to supersede previous data. Full coverage MBES and MBAB (Table 2 and Figures 2-4) were achieved within the survey limits of H13358. All waters in survey area Complete coverage (HSSD 2019 5.2.2.3) Survey coverage was in accordance with the requirements listed above and in the HSSD. Survey H13358 complete coverage MBES file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_FullCov.jpg Survey H13358 1m complete coverage MBES density QC file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_MB_1m_MLLW_FINAL.QAv6.density.png Survey H13358 2m complete coverage MBES density QC file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_MB_2m_MLLW_FINAL.QAv6.density.png M/V GO Freedom 0.0 1700.71 0.0 0.0 0.0 0.0 0.0 73.77 0.0 M/V Pelagos 0.0 11.94 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1712.65 0.0 0.0 0.0 0.0 0.0 73.77 0.0 4.31 9 0 0 0 48.17 2020-06-20 2020-06-21 2020-06-22 2020-06-23 2020-06-24 2020-06-25 2020-06-26 2020-06-27 2020-06-28 2020-07-06 2020-07-07 2020-07-08 2020-07-09 2020-09-25 2020-09-26 Refer to the Data Acquisition and Processing Report (DAPR) for a complete description of data acquisition and processing systems, survey vessels, quality control procedures and data processing methods. Additional information to supplement sounding and survey data, and any deviations from the DAPR are discussed in the following sections. M/V GO Freedom 150.0 12.0 M/V Pelagos 34.0 2.0 M/V GO Freedom file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/GOFreedom2020.JPEG M/V Pelagos file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/MV_Pelagos.jpg M/V GO Freedom (Table 5 and Figure 5) and M/V Pelagos (Table 5 and Figure 6) acquired MBES, acoustic backscatter, surface sound velocity, sound velocity profiles, and attitude and positioning data within the survey limits of H13358 (Table 6). For a detailed listing of equipment used to acquire survey data, refer to the DAPR submitted with this report under Project Reports. MBES Teledyne RESON SeaBat 7125 SV2 Sound Speed System Teledyne RESON SVP 70 Conductivity, Temperature, and Depth Sensor AML Oceanographic Smart SVP Positioning and Attitude System Applanix POS MV 320 v5 Positioning and Attitude System Applanix POS MV 320 v4 For a detailed listing of equipment, refer to the DAPR submitted with this report. Crosslines for survey H13358 were acquired in accordance with section 5.2.4.2 of the HSSD 2019 (Figure 7). Of the 9,534,174 grid nodes compared between H13358 main scheme MBES and MBES crosslines, 99.9% were within 50cm difference. The mean difference is 3cm, with a standard deviation of 8cm (Figure 8). H13358 MBES mainscheme and MBES crossline distribution file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_XL_dist.jpg H13358 MBES mainscheme differenced from MBES crosslines statistical output file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_XL_diff.jpg ERS via VDATUM 0.1 0.101 M/V GO Freedom 1.645 N/A N/A 0.25 M/V Pelagos 0.972 N/A N/A 0.25 Survey H13358 uncertainty values (Tables 7 and 8) were evaluated in both CARIS HIPS 11.3 and via Pydro QC Tools v3.2.10. The finalized 1m (Figure 9) and 2m (Figure 10) bathymetric grids meet uncertainty standards with a minimum of 99.5% of nodes passing. H13358 1m finalized grid TPU QC file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_MB_1m_MLLW_FINAL.QAv6.tvu_qc.png H13358 2m finalized grid TPU QC file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_MB_2m_MLLW_FINAL.QAv6.tvu_qc.png Four contemporary surveys are available for comparison to H13358: H13359, H13357, H13361, and H13287 (2019) (Table 9 and Figure 11). Junction surveys to H13358 file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_JNX.jpg H13357 5000 2020 Fugro Pelagos E Survey H13357 was acquired by Fugro Pelagos in 2020 as a part of OPR-J359-KR-20. Of the 4,874,012 grid nodes compared between H13358 and H13357, 99.9% agree within 50cm (Figure 12). Survey H13358 junction with Survey H13357 file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_JNX_H13357.jpg H13359 20000 2020 Fugro Pelagos W Survey H13359 was acquired by Fugro Pelagos in 2020 as a part of OPR-J359-KR-20. Of the 3,785,024 grid nodes compared between H13358 and H13359, 99.9% agree within 50cm (Figure 13). Survey H13358 junction with Survey H13359 file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_JNX_H13359.jpg H13361 5000 2020 Fugro Pelagos N Survey H13361 was acquired by Fugro Pelagos in 2020 as a part of OPR-J359-KR-20. Of the 195,645 grid nodes compared between H13358 and H13361, 99.9% agree within 50cm (Figure 14). Survey H13358 junction with Survey H13361 file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_JNX_H13361.jpg H13287 40000 2019 Fugro Pelagos S Survey H13287 was acquired by Fugro Pelagos in 2019 as a part of OPR-J359-KR-19. Of the 2,830,805 grid nodes compared between H13358 and H13287, 99.9% agree within 50cm (Figure 15). Survey H13358 junction with Survey H13287 (2019) file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_JNX_H13287.jpg Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR. None Exist There were no conditions or deficiencies that affected equipment operational effectiveness. None Exist There were no other factors that affected corrections to soundings. Sound velocity profiles were acquired every two hours from the M/V GO Freedom and M/V Pelagos using an AML SV&P probe. Refer to the DAPR for additional information. All equipment and survey methods were used as detailed in the DAPR. All data reduction procedures conform to those detailed in the DAPR. All sounding systems were calibrated as detailed in the DAPR. No backscatter deliverables are submitted with survey H13358. One line of data per vessel, per day was processed to ensure quality control. All equipment and survey methods utilized in the acquisition and processing of backscatter are detailed in the DAPR. CARIS HIPS and SIPS 11.3.3 QPS Fledermaus 7.9.3 NOAA Profile Version 2020 H13358_MB_1m_MLLW CARIS Raster Surface (CUBE) 1 9.91 22.42 NOAA_1m Complete MBES H13358_MB_1m_MLLW_Final CARIS Raster Surface (CUBE) 1 9.91 20.0 NOAA_1m Complete MBES H13358_MB_2m_MLLW CARIS Raster Surface (CUBE) 2 9.92 22.41 NOAA_2m Complete MBES H13289_MB_2m_MLLW_Final CARIS Raster Surface (CUBE) 2 18.0 22.41 NOAA_2m Complete MBES Additional information discussing the vertical or horizontal control for this survey can be found in the accompanying DAPR. Mean Lower Low Water ERS via VDATUM GeneralArea_Apalachicola_100m_NAD83-MLLW_geoid12b North American Datum 1983 Projected UTM 16 All positioning and attitude data associated with OPR-J359-KR-20 was post-processed in POSPac MMS using PP-RTX methods. For further discussion, reference the DAPR submitted with this report. A chart comparison was conducted using the Triangle Rule script within the Chart Review Tool of Pydro QC Tools. A combined s57 file of charted soundings extracted from ENCs listed in the project instructions and an s57 file of surveyed soundings were compared with the following results (Figure 16). Survey H13358 surveyed soundings show significant difference to charted soundings. There are 4,111 instances where surveyed soundings are shoal to charted soundings by more than 1ft: 2,889 surveyed soundings are 1ft or less shoal to charted; 1,093 surveyed soundings are 1ft to 2ft shoal to charted; 122 surveyed soundings are 2ft to 3ft shoal to charted; 5 surveyed soundings are 3ft to 4ft shoal to charted; and 1 surveyed sounding is 8ft shoal to charted. The majority of all instances where surveyed soundings are 1-3ft shoal to charted soundings occurs where sand wave crests have shifted, likely due storm activity (Figure 17). The maximum difference of surveyed soundings shoal to charted soundings is 8ft. This difference occurs along an area of debris, previously uncharted (Figure 18). Reference the Final Feature File associated with this survey for further detail. Pydro QC Tools chart review output of surveyed soundings shoal to charted soundings file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_ChartComp_heatmap.png Pydro QC Tools output of areas of shoaling of up to 3ft file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_ChartComp_3ft.jpg Previously uncharted debris field; survey sounding variance up to 8ft shoal to charted values file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_ChartComp_4ft_plus.jpg US4FL68M 80000 17 2019-09-06 2019-10-01 No shoals or potentially hazardous features exist for this survey. One assigned, charted obstruction point was investigated within the survey limits of H13358. No obstruction was detected. Hydrographer recommends deletion of charted obstruction. Reference the Final Feature File associated with this survey for further detail. One uncharted obstruction area was noted within the extents of survey H13358 (Figure 19). Reference the Final Feature File associated with this survey for further detail. Uncharted obstruction area file:///B:/OPR_J359_KR_20/Surveys/H13358/01_SAR/Reports/DR/Descriptive_Report/Report/SupportFiles/H13358_Obst_Area_Extents.jpg No channels exist for this survey. There are no designated anchorages, precautionary areas, safety fairways, traffic separation schemes, pilot boarding areas, or channel and range lines within the survey limits. No Aids to Navigation (ATONs) exist for this survey. No Maritime Boundary Points were assigned for this survey. A total of 9 bottom samples were assigned within the survey limits of survey H13358. Reference the Final Feature File associated with this survey for further detail. No overhead features exist for this survey. No submarine features exist for this survey. No platforms exist for this survey. No ferry routes or terminals exist for this survey. No abnormal seafloor and/or environmental conditions exist for this survey. No present or planned construction or dredging exist within the survey limits. No new surveys or further investigations are recommended for this area. No new insets are recommended for this area. As Chief of Party, field operations for this hydrographic survey were conducted under my direct supervision, with frequent personal checks of progress and adequacy. I have reviewed the attached survey data and reports. All field sheets, this Descriptive Report, and all accompanying records and data are approved. All records are forwarded for final review and processing to the Processing Branch. The survey data meets or exceeds requirements as set forth in the NOS Hydrographic Surveys Specifications and Deliverables, Field Procedures Manual, Letter Instructions, and all HSD Technical Directives. These data are adequate to supersede charted data in their common areas. This survey is complete and no additional work is required with the exception of deficiencies noted in the Descriptive Report. Dean R Moyles Chief of Party 2019-12-31